Helical roll for a conveying unit



FIG. 1 is a top front perspective view of a helical roll for a conveying unit showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image of that shown;

FIG. 3 is a side elevation view thereof, the opposite side elevation view being a mirror image of that shown. 

The ornamental design for a helical roll for a conveying unit, as shown and described. 